EDTA-enhanced phytoremediation of lead contaminated soil byBidens maximowicziana
WANG Hong-qi , LU Si-jin , LI hua , YAO Zhi-hua
DOI:
Received December 27, 2006,Revised August 31, 2007, Accepted , Available online
Volume 19,2007,Pages 1496-1499
- Summary
- References
- Related Articles
Phytoremediation is a potential cleanup technology for the removal of heavy metals from contaminated soils. Bidens maximowicziana
is a new Pb hyperaccumulator, which not only has remarkable tolerance to Pb but also extraordinary accumulation capacity for Pb. The
maximum Pb concentration was 1509.3 mg/kg in roots and 2164.7 mg/kg in overground tissues. The Pb distribution order in the B.
maximowicziana was: leaf > stem > root. The e ect of amendments on phytoremediation was also studied. The mobility of soil Pb
and the Pb concentrations in plants were both increased by EDTA application. Compared with CK (control check), EDTA application
promoted translocation of Pb to overground parts of the plant. The Pb concentrations in overground parts of plants was increased
from 24.23–680.56 mg/kg to 29.07-1905.57 mg/kg. This research demonstrated that B. maximowicziana appeared to be suitable for
phytoremediation of Pb contaminated soil, especially, combination with EDTA.
